Improvement in harrows



'A. B. BAKER. Harrow.

7 No. 197,586. Patented Nov. 27,1 77.

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N-PETERS, PHGI'O-LI'THOGRAPHEE WASHINGTON. D O.

UNITED STATES PATENT OFFICE.

ANSON B. BAKER, OF WOODHULL, ILLINOIS.

IMPROVEMENT IN HARROWS.

Specification forming part of Letters Patent No. 197,586, dated November27, 1877 application filed July 2, 1877.

resents enlarged views of the coupling-hook and brace.

My invention consists in connecting sections of a harrow of rectangularform by means of a coupling of novel construction, hereinafter moreparticularly described.

In the drawing, A represents the draft-bar, to which each harrow-sectionB B B is attached by a chain, 1), secured at one corner, preferably 011the under side of the beam. On the side beams of the center section is arod, 0, with each end bent at right angles and then passing through around collar, 0, forming a shoulder, which rests against the side of thebeam through which the ends of the rod pass, and are secured on theinner side by nuts. Attached to each inside beam of the outside sectionsis a brace, d, shaped as shown -in the drawing, and at each end boltedor riveted to the beam. A square hole in the center of this bracereceives the bolt end of the coupling-hook c, which is square incross-section, and has a shoulder, e, to abut against the brace, so thatwhen the bolt-nut on inner side of beam is turned the shoulder is drawnclose to the brace, the hook becoming rigidly secured and capable ofwithstanding great strain. The rod 0, as described, and the hook c withbrace d constitute the coupling, and while affording to each section auniversallyindependent movement cannot accidentally come uncoupled. Touncouple requires the outside section to be raised or turned immediatelyover the center section.

In practice I give about twelve inches space ing united by bolts passingthrough the beams and braces. The beams are provided with teeth in theusual manner.

The mode of coupling the sections of a harrow, by the coupling shown andherein described, permits to each section a thoroughlyindependentmovement. Either section may have a back-and-forth or vibratory motionof twelve inches, a side tilting motion of six inches, and an endup-and-down or oscillatin g motion almost without limit. The advantageswhich such free movement affords will be readily recognized by allfamiliar with the inconveniences of ordinary barrows.

The advantage of attaching the chains to the under side of beam is, itprevents the front end from plowing the ground, which, if chains arefastened to the end or upper side of beam, sometimes causes the harrowto turn over and strike the horses.

-Havin g described my invention, I claim and desire to secure by LettersPatent- The improved coupler for harrows, consisting of the rod 0,passing through the collar 0 on the outside of the beam of one sectionand secured on the inner side of beam by a nut, and the brace d, shapedas shown in the drawing, with square hole to receive the bolt end ofhook 0, having the shoulder c resting against the brace attached toanother section, the coupler being arranged centrally to the beams, asshown and described, affording an independent movement to each section.

ANSON B. BAKER. Witnesses:

W. RICHARDS, I. W. HORN.

